Select the proper order of the propagation of an electrical (depolarization) signal in the heart.
A) AV node → Purkinje fibers → SA node
B) AV node → SA node → Purkinje fibers
C) Purkinje fibers → AV node → SA node
D) Purkinje fibers → SA node → AV node
E) SA node → AV node → Purkinje fibers

Question

Quizplus · Accepted Answer

The proper order of the propagation of an electrical (depolarization) signal in the heart starts at the SA node (sinoatrial node), then moves to the AV node (atrioventricular node), and finally travels through the Purkinje fibers. This sequence ensures the coordinated contraction of the heart chambers.

Select the Proper Order of the Propagation of an Electrical